Loading machine



Sept. 21, 1954 D. M. SCHWARTZ LOADING MACHINE 2 Sheets-Sheet 1 Filed Oct. 24, ,1950

k D O O O o O O O o O O O O O n w 0 0 Q o O o o o o o o o d O o O 0 L K Q U 0 O H O 0 WM .Q o o o LN? .Q\ 3 5%! Sept. 21, 1954 D. M. SCHWARTZ LOADING MACHINE 2 Sheets-Sheet 2 Filed 001,. 24, 1950 INVEN TORT.

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Patented Sept. 21, 1954 LOADING MACHINE Daniel M. Schwartz, Salt Lake City, Utah, as-

signor to The Eimco Corporation, Salt Lake City, Utah, a corporation of Utah Application October 24, 1950, Serial, No. 191,808

a 2 Claims. 1

This invention relates to a material handling machine of the overhead bucket type particularly adapted for use in mines and tunnels where, because of limited available space and extreme working conditions, compactness, mobility, and case of repair are essential features.

An object is to provide an improved device of the class described having discharge bumpers designed to absorb the high discharge momentum of the overhead bucket .with a minimum of overturning moment on the loader.

A further object is the provision of such bumpers without increasing the overall length of the loading machine, or decreasing the discharge distance of the bucket behind the loader.

These and other objects and advantages of the invention will appear more clearly in connection with the illustrative embodiments of the invention shown in the accompanying drawings, in which:

Fig. l is a right side elevation of the overhead material handling machine of the invention;

Fig. 2 is an enlarged fragmentary view of the bucket assembly and bumper means of the invention with a portion broken away to show structural details.

With reference to the illustrative embodiments of the invention there is shown a mining apparatus embodying the principles of the invention which generally comprises a main frame or body I0, mounted on individually operated and controlled crawler or self-laying track unit II.

The main frame I carries an overhead bucket assembly I3 upon parallel tracks I4 secured to the frame I0.

At the forward end of the frame is the power plant generally designated I5 wherein is housed a prime mover to supply power for the shovel bucket I23 and the self-laying tracks.

The material handling structure I3, of the mining machine is of the overhead rocker type. The side frames 92 of the rocker structure have curved lower surfaces for rolling engagement with parallel rails or tracks I4, the radius of curvature of the surfaces increasing from the forward to the rear ends of the curved sections.

Bumpers I05 are designed to absorb the high discharge momentum of the rocker bucket, without causing the front end of the loader to lift upwardly. This requires a substantial shock absorbing stroke in the bumper piston I06 to reduce the impact force and overturning moment on the loader.

In order to provide the necessary support for the bucket bumpers without increasing the overall length of the loading machine or decreasing the discharge distance of the bucket behind the loader, the bumpers housing or cylinders I0'I are mounted within the rocker frames 92 and are located at the wide section of the frames. Thus installed, the bumpers at the point of impact with the pistons compressed do not extend beyond the rocker frames 92.

A double walled piston I05 is slidably mounted within the cylindrical housing I01. A collar I08 secured to the head of the cylinder and an internal flange or band I09 within the cylinder form the sliding surfaces for the outer piston wall IIO. between the inner and outer walls of piston I06, and bearing against a piston cap H3 at one end and against a spring retaining hub H4 of the cylinder at the other end, absorb the discharge momentum of the rocker assembly.

In the dumping position piston cap II3 contacts bumper plates H5 rigidly secured to a frame H6. Braces II'I connect the upper ends of frame I I6 and frame members is. The bumper frame IIS and braces III are pin-connected at their ends to provide an easily dismantled assembly that may be speedily removed or folded down upon the vehicle frames for clearance.

A fiat chain or cable IIB, attached at one end to the bucket reel 3|, extends over yoke bar H9 and is secured to a yoke or spreader bar I20 that joins the side frames of the rockers 9'2. Rotation of reel 3| raises and lowers the shovel bucket.

From the foregoing description of the invention, it will be seen that an improved material handling machine having an overhead bucket is provided, whereby the aims, objects and advantages are fully accomplished.

It will be evident that various modifications may be made in the construction of the machine for example the bucket discharge bumpers may be provided on any type of overhead bucket without departing from the scope of the invention.

Similar subject matter is disclosed or claimed in the following applications: application Serial No. 191,807 filed October 24, 1950; application Serial No. 228,082 filed May 24, 1951; application Serial No. 230,365 filed June '7, 1951; and divisional applications Serial Nos. 261,834 and 261,- 835 filed December 14, 1951.

We claim:

1. In a material handling machine having a main frame, an arm mounted on said frame, a shovel bucket rigidly secured at one end of Thrust springs III and H2, positioned s eam 3 said arm, said arm being adapted for transporting said shovel bucket from a low forward material gathering position to an upward material dumpin position at the rearward end of the machine, bumper means for absorbing the high discharge momentum of the shovel bucket and said arm without increasing-the overall length of the main frame of said material handling machine comprising, a cylinder having substantial length mounted adjacent said one end of the arm and when in the dumping position the forward end of said cylinder being positioned forwardly of the most rearward extension of said arm, a piston slidably mounted in said cylinder and urged into extended position, and a substantial ly vertically extending frame mounted at the rearward end of the main frame having means" at its upper end adapted to engage the .pistonas the bucket approaches the dumping position.

' 2. In a material handling machine havin a main frame, paired rocker arms mounted for rolling engagement with trackways on the main frame,'a shovel bucket carried at one end of said rocker arms, said rocker arms having curved surfaces for transporting said shovel bucket from a low forward material gathering position to an upward material dumping position at the rearward end of the machine, bumper means for 4 absorbing the high discharge momentum of the shovel bucket and said rocker arms without increasing the overall length of the main frame of said material handling machine comprising cylinders having substantial length mounted adjacent said one end of said rocker arms and when in the dumping position the forward ends of said cylinders being positioned forwardly of the most rearward extension of said rocker arms, pistons ,slidably mounted in each of said cylinders and urged into extended position, and a substantially vertically extending frame mounted at the rearward end of the mainframe having means at its upper end adapted .to engage the pistons as the bucket approaches the dumping position.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,442,852 Brackett .Jan. .23, 1923 1,728,279 Ramsey Sept. 17, 1929 1,813,864 Ranch et al July 7, 1931 1,862,934 Knox June 14, 1932 1,906,000 Finlay etal Apr. 25, 1933 2,398,859 Ruddock Apr. 23, 1946 2,407,088 Maxson Sept. 3, 1946 2,495,138 Royle Jan. 17, .1950 

